You are a flight assistant. 
 USER: Hi. I am Amanda Anderson.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please help me in changing my existing reservation?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, we found a reservation  on your name. Can you please share your travelling dates?

USER: My travelling dates are Aug 31st and Sept 2nd.

ASSISTANT: Please share your airport codes?

USER: My airport codes are from JFK to IAH.

ASSISTANT: May I know your depart and arrival timings?

USER: The return time should be evening.

ASSISTANT: Please share your connection limit?

USER: I need a flight with single connection.

ASSISTANT: We found a connecting flight 1027 in UA airline with fare 100 and class is economy with return time is 20:00 PM. Shall I proceed?

USER: Please reserve it.

ASSISTANT: Your booking has been reserved.

USER: Thank you for your service.

ASSISTANT: Thank you for availing us.