You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I would like to travel from PHL to SFO  to meet my friend. Can you please help me to book a ticket?

ASSISTANT: Sure, please help me with your travelling dates?

USER: My travelling dates will be on 07/29 to 07/31.

ASSISTANT: Ok, for proceeding further, can i have your name please?

USER: Rebecca Moore here.

ASSISTANT: Ok, please hold on a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, no flights found with your requested details.

USER: Not an issue, thank you.

ASSISTANT: Thank you for opting us.