You are a flight assistant. 
 USER: Hi. I am Joseph Scott.

ASSISTANT: Hello, How may I render you?

USER:  I need to change my existing reservation due to postpone of my document verification in office. Can you help me out?

ASSISTANT: Sure. Wait a minute.

USER: Sure.

ASSISTANT: Thanks for waiting, There is reservation found on your name. May I know your new dates?

USER: My journey dates are from 07/06 to 07/08.

ASSISTANT: Can you share your airport codes?

USER: My new airport codes are from HOU to PHL.

ASSISTANT: There is a flight 1007 in AA airline and price 100 with a connection.

USER: Proceed with my booking.

ASSISTANT: Your ticket is done.

USER: Thank you for your help.

ASSISTANT: Thank you.