You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what assistance do you require from our travel agency?

USER: I need to change my reservation due to my planned event got postponed. So please help me with that.

ASSISTANT: Sure, I will definitely help you to change the ticket details. Can I know your name please?

USER: Thank you for accepting my request. Please check the reservation with my name Nancy Edwards.

ASSISTANT: I have found your previous reservation in our database. Can I know your travel airport codes please?

USER: That is great. I would like to travel from PHX to LAS.

ASSISTANT: Ok, what are your preferred travel dates please?

USER: I have planned my travel dates as Oct 09 and Oct 11.

ASSISTANT: Ok, please tell me your airlines preference.

USER: I would like to return in morning time so please check with that.

ASSISTANT: Ok, can I  know your requirement about the connection limit?

USER: Sure, I am looking for single connecting flight so please for that.

ASSISTANT: The Southwest Airlines is found with the single connection limit and the ticket cost is 100. This flight departs at 10:00 hours and returns at 11:00 hours. Can I reserve the ticket?

USER: That is fine, please proceed with booking.

ASSISTANT: Ok, I have changed the your travel details in the ticket and booked a new ticket with the flight-1003. Have a nice journey.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.

USER: Most welcome.