You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What service that you are expecting from our agency?

USER:  Can you please book a flight ticket to my brother on the name of Kenneth Hall?

ASSISTANT: Sure, I am gleeful to help you in flight ticket booking process.

USER: Thank you.

ASSISTANT: Ok, may I know your brother's itinerary planned date to go there?

USER:  He wants to departure from Detroit on 04/26.

ASSISTANT: Ok, may I know his genesis and terminus airport codes for booking?

USER: My brother's source location is Detroit, the nearest airport code is DTW and he needs to reach New York-EWR.

ASSISTANT: Ok, is there any return trip that he is planning?

USER: I think he wants to return Detroit on 04/28, if it is not possible for him on that date to return, could your agency can change his return date?

ASSISTANT: Yes, our agency have a facility to change the reservation. You don't worry about that but please mention before two days of your return journey.

USER: Sure, thank you.

ASSISTANT: It's alright. Can you please re verify your brother, the above mentioned details are perfect or he would like to change anything else?

USER: Everything is perfect, please book a flight ticket as per my brother's requirements.

ASSISTANT: I am keeping the conversation on hold to check the flights and I will revert back with a best flight in our agency.

USER: Sure, take your own time.

ASSISTANT: Thank you for being on hold. Yes, there is a flight with a less cost of 300 but there is single stop over in his journey provided by UA airlines. If he is ok with it, please inform me to book.

USER: But my brother's budget limit is 200. Can you please recheck is there any flight available with in his budget limit?

ASSISTANT: Sorry to inform you that, there are no flights available within that budget limit as per his requested dates.

USER: Oh! It's ok no problem, we will contact another flight ticket booking agency.

ASSISTANT: Sorry for the inconvenience caused from our agency.

USER: I really appreciate all the hard work you’ve done to help us. Thank you.

ASSISTANT: Thank you for approaching us, hope you have a great day. Please give the feedback about my assistance in our website.

USER: Sure, you are welcome.