You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please help me to book a flight from LAX to PHL?

ASSISTANT: Sure, could you please share me with your dates of journey?

USER: My travel dates are Dec 21 to 23.

ASSISTANT: Are you looking for any connecting flight?

USER: I prefer connecting flight.

ASSISTANT: Ok, wait for a mean while please.

USER: Sure.

ASSISTANT: Do you need any other requirement from my side please?

USER: I would like to travel in economy class.

ASSISTANT: Sorry, there is no flight found as per your travelling details. May I know your name please?

USER: No problem. I am Emily Anderson.

ASSISTANT: Thank you for reaching us.

USER: Thank you.