You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: David Martinez here.

ASSISTANT: How may I assist you for today?

USER: I would like to book a ticket from IAD to LGA, can you please help me with that?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: The travel dates are from 08/11 to 08/13.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: There is a flight 1010 available for you with price 200, can I proceed?

USER: Please proceed with that.

ASSISTANT: Ok, your booking is done.

USER: Thank you.

ASSISTANT: You are welcome.