You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am David Jones.

ASSISTANT: How can I assist you?

USER: I am planning to travel from SEA to PHL, help me in booking a flight?

ASSISTANT: Sure, can I know the travel dates please?

USER: I like to travel on 11/16 to 11/18.

ASSISTANT: Do you have any requirements?

USER: I want to travel in direct flight and I want board in evening.

ASSISTANT: Sorry, there are no flights found as per your request.

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

ASSISTANT: Thank you for approaching us.