You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you at this moment?

USER: Cynthia Walker here. Can you help me in booking my flight ticket from Washington to Philadelphia?

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

USER: My travelling dates will be Nov 10 to Nov 12.

ASSISTANT: Do you need any lay by in between the journey?

USER: Yes, I prefer a lay by in between my journey.

ASSISTANT: Ok, what type of class do you prefer?

USER: I am comfortable with any class.

ASSISTANT: May I know your airport codes of travelling?

USER: My starting point is DCA, my landing airport code is PHL.

ASSISTANT: How much you can afford for a flight ticket?

USER: I can afford up 5000.

ASSISTANT: Ok, please give me a minute.

USER: Sure.

ASSISTANT: We found a Frontier airline with fare of 200 matches your travelling schedule. Shall I proceed with booking?

USER: You can proceed.

ASSISTANT: Your ticket has been confirmed with flight number 1020.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.