You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Could you please help me in flight ticket booking process from IAH to OAK?

ASSISTANT: Sure, I am here to help you. Can you please share your travel dates?

USER: Thank you for your response, I want to take off on July 31 and book my return ticket also on Aug 02.

ASSISTANT: Do you have any connection limit?

USER: I will prefer direct flight.

ASSISTANT: May I know your airline preference?

USER: I don't have any preferences so please go with above details.

ASSISTANT: Ok, may I know your name for documentation purpose?

USER: Sure, my name is Jennifer Adams.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: That's ok, no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us.