You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How exactly I can serve you the best today?

USER: I am Rebecca Thomas.

ASSISTANT: Ok.

USER: I need to catch a flight on 05/18 at Phoenix, AZ - PHX. Can you serve me?

ASSISTANT: Sure, I would be happy to help you.

USER: Thank you.

ASSISTANT:  Let me know your source point and return date?

USER: My return date is 05/20.

ASSISTANT: Can you share me destination point please?

USER: My destination is San Francisco, CA - SFO.

ASSISTANT:  Ok, Is there any restriction for price?

USER: Yes, 1000 is my price limit.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: OK.

ASSISTANT: We found a flight with one connection, matching your needs. The airline is UA, flight number is 1001 and airfare is 100.

USER: Good, you may please proceed.

ASSISTANT: Your ticket has been reserved with UA airline.

USER: Thank you.

ASSISTANT: Thank you for reaching us.