You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Timothy Johnson.

ASSISTANT: How may I help you, Johnson?

USER:  have planned a trip with my ex-colleagues who are staying at Charlotte, can you help me to book a ticket from IAD to CLT. My travelling dates are 02/15 to 02/17.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: There is a flight with Delta airlines available with price 100. Shall I book the ticket?

USER: You can book it.

ASSISTANT: Your ticket is confirmed with flight-1001.

USER: Thank you for helping.

ASSISTANT: Thank you for using our services.