You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Mary Edwards here.

ASSISTANT: How may I help you?

USER: Can you please help me in booking a ticket from DCA to IAH? as I have to go for Christmas shopping.

ASSISTANT: Sure Mary, may I know your journey dates please?

USER: My travel dates are 12/21 and 12/23.

ASSISTANT: Please give me a minute.

USER: Sure.

ASSISTANT: Mary, I found a flight with Hawaiian airlines available with price 100. Shall I book the ticket for you?

USER: Yes, please proceed.

ASSISTANT: Your ticket is confirmed and the flight number is 1001.

USER: Thank you so much.

ASSISTANT: Thank you for reaching us.