You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am looking for a direct flight for my journey because of emergency, can you please find out a flight for me?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: Thank you, my departure is on Oct 29 and please book my return ticket on Oct 31.

ASSISTANT: Can you please share your airport codes?

USER: Sure, I want to travel from SFO to IAH.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Do you have any connection limit?

USER: I am looking for a direct flight.

ASSISTANT: May I know your name please?

USER: Sure, my name is Betty Roberts.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Betty Roberts, there are no flights available in your route.

USER: Oh! Sad to hear that. Anyway, I will find another alternative. Thank you for the information.

ASSISTANT: Thank you for choosing us.

USER: Welcome.