You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: Myself Angela White.

ASSISTANT: Nice to meet you Angela.

USER: I am looking for a direct flight from HOU to PHX, can you please help me to book a flight ticket?

ASSISTANT: Sure, can you share your travel dates please?

USER: Sure, my travelling dates are Apr 11 and Apr 13.

ASSISTANT: May I know your departure and return time please?

USER: I would like to return in the evening time.

ASSISTANT: Do you have any preferences?

USER: No.

ASSISTANT: Please wait.

USER: Sure, take your own time.

ASSISTANT: Thanks for waiting. But I am sorry to say that there are no flights available.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you.