You are a flight assistant. 
 USER: Hello, I am Elizabeth Davis.

ASSISTANT: Hello, how may I assist you today?

USER: Can you help me booking a flight ticket from HOU to IAH?

ASSISTANT: Sure, could you please mention your source and destination codes? Sorry, mention your travelling dates please.

USER: Sure. I will start on 05/19 and return on 05/21.

ASSISTANT: Ok, do you need any stop over in between the journey?

USER: I am comfortable with any flight.

ASSISTANT: Thanks for providing your details, we found a Spirit airlines with a fare of 100 and the flight number is 1016. Shall I book it?

USER: Please proceed with the booking.

ASSISTANT: Sure, your booking is done on the name of Elizabeth Davis.

USER: Thank you for your kind service.

ASSISTANT: Thank you for choosing us.