You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Angela Lewis.

ASSISTANT: Yes, Angela.

USER: I am planning to travel from IAD to DEN, can you help me in that?

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

USER: My date of journey is on 08/09 to 08/11.

ASSISTANT: Angela, give me a moment. Frontier airline is providing an available flight with 1000 number.Can I proceed?

USER: Proceed for booking.

ASSISTANT: Your ticket has booked.

USER: Thank you for helping me.

ASSISTANT: Thank you for choosing us.