You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Amanda Brown. Can you please help me in booking a flight ticket to Philadelphia, PHL from Houston, IAH?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: I would like to depart on 11/25. My return will be on 11/27.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: It's ok, no problem.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your information.