You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Can you please help me in booking my flight ticket from PHL to LAX?

ASSISTANT: Ok, please can I know your dates of journey?

USER: My travelling dates are Oct 25 and Oct 27.

ASSISTANT: Ok, may I know your other specifications?

USER: I need my return ticket at afternoon time. I need single connection flight.

ASSISTANT: Ok, please mention the class preferences.

USER: No, other preference.

ASSISTANT: Ok, thank you for waiting. Sorry, there is no flight ticket available at the time you prefer.

USER: Thanks for your information.

ASSISTANT: Thank you for choosing our agency. May I know your name?

USER: Myself Christine Smith.

ASSISTANT: Ok, thank you for providing your name.