You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I support you today?

USER: My name is Dennis Hill, I would like to visit Boston to meet my sister. Can you please help me in booking the ticket from  BOS to PHL?

ASSISTANT: Sure, We are here to help you. Can I know your travelling dates?

USER: My travel dates are 12/17 and 12/19.

ASSISTANT: Do you need any break?

USER: I need a halt in my journey.

ASSISTANT: May I know if you prefer to have any other comforts in your journey?

USER: Yes, I can only pay 5000 for the ticket.

ASSISTANT: Thank you for providing your details, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, I regret to inform you that there are no flights obtained on your journey dates to book a flight ticket.

USER: Not an issue, thank you for the information.

ASSISTANT: Thank you for opting us.