You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: David Wilson here.

ASSISTANT: David, how may I help you?

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

ASSISTANT: Sure, please provide your travel dates.

USER: The travel dates are from 10/21 to 10/23.

ASSISTANT: Please hold on for a moment.

USER: Ok.

ASSISTANT: Frontier airlines with flight 1001 is available.

USER: Please proceed.

ASSISTANT: Your ticket is booked.

USER: Thank you.

ASSISTANT: Thank you for reaching us.