You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to book a ticket from IAD to SFO can you help me?

ASSISTANT: Sure. Can you share the dates of journey?

USER: My planned dates are from 02/10 to 02/12.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: There is a flight in airline Spirit, and number is 1007. Can I book it?

USER: Ok, please book my ticket.

ASSISTANT: May I know your name before booking?

USER: My name is George Garcia.

ASSISTANT: Your ticket is booked. Have a safe flight.

USER: Thank you for your help.

ASSISTANT: Thank you for contacting us.