You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Stephanie Davis.

ASSISTANT: Stephanie Davis, how can I assist you?

USER: Could you please book a flight ticket with a direct flight to Phoenix?

ASSISTANT: May I know your itinerary dates?

USER: I want to travel on Oct 7th and return back on Oct 9th.

ASSISTANT: Please share your airport codes.

USER: HOU and PHX are my journey airport codes.

ASSISTANT: Do you have any specifications?

USER: I want to return in the evening.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no flights are available on your route as per your requirements.

USER: Not a problem, thank you for your information.

ASSISTANT: Thank you for reaching us.