You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: My name is Janet Thomas, I want to book a direct flight to meet my child hood friend at IAD, can you help me with booking?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: I will fly on Dec 13 and recur on Dec 15.

ASSISTANT: Can you please provide your source airport code?

USER: My source airport code is PHL.

ASSISTANT: Do you have any class preferences?

USER: My return time is morning.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: No.

ASSISTANT: Sorry, there are no flights available at your request.

USER: Ok, no problem. Thank you for your response.

ASSISTANT: Thank you for contacting us, have a nice day.