You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I need to attend my friend marriage in Seattle, can you please make a reservation from Philadelphia?

ASSISTANT: Can I know your travelling dates?

USER: My journey start on Jan 14th, and need to catch return flight on Jan 16th.

ASSISTANT: Do you have any preference?

USER: Yes, I prefer a connecting flight. And my return flight time should be in the evening.

ASSISTANT: Do you have any class preference?

USER: Any class is ok for me.

ASSISTANT: Let me know your name.

USER: My name is Rachel Brown.

ASSISTANT: Can I know your airport codes?

USER: My airport codes are, PHL to SEA.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: Ok, no problem.

ASSISTANT: Thank you.

USER: Thank you.