You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Andrew Perez here.

ASSISTANT: How can I assist you?

USER: I have to go Detroit as I am going to give guest lecture in famous university so please help me with flight ticket booking.

ASSISTANT: Yes, I will try for my best.

USER: Thank you.

ASSISTANT: Can I know your travelling dates?

USER: Sure, I need to travel on dates of 10/02 and 10/04.

ASSISTANT: ok, could you provide me your nearest airport codes?

USER: Sure, I have to depart from LAX and return from DTW.

ASSISTANT: Ok, give me a moment.

USER: Sure, take your time.

ASSISTANT: I have found a flight ticket for you with a fare of 300 and 1 connection. Can I proceed to booking?

USER: My budget is 200 so please check with that.

ASSISTANT: Sorry, there is no flight found with in your budget.

USER: Oh! It is sad to hear, anyway thank you for your time.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.