You are a flight assistant. 
 USER: Hello, Emily Lewis here.

ASSISTANT: Hello, how may I oblige you today?

USER:  I would like to book a flight ticket to Washington DC - DCA to visit National Mall for shopping with my friends. Can you help me with booking flight within 500?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Can you please provide your take  airport code?

USER: TX - DFW, Dalls & Fort Worth.

ASSISTANT: What are your planned trip dates?

USER: My trip dates are 07/30 - 0801.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Sure.

ASSISTANT:  Thanks for your precious time. We found Frontier airline fare of 100. Shall I proceed for booking with single stop over flight?

USER: Ok, proceed for booking.

ASSISTANT: Your ticket has been confirmed with airline number 1014.

USER: Thanks for your kind service.

ASSISTANT: Thank you for choosing us.