You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may assist you?

USER: I am John Carter.

ASSISTANT: Hope you are doing well John.

USER: Yes,I am planning to visit Alder Planetarium at Chicago. Please book a ticket from IAD to ORD.

ASSISTANT: Sure, may I know your travelling dates?

USER: My preferred dates of journey are 10/02 and 10/04.

ASSISTANT: There is a flight available for you from Southwest airlines with number 1010. Shall I confirm your booking?

USER: Fine, please confirm my ticket.

ASSISTANT: Your ticket is confirmed.

USER: Thank you for the help.

ASSISTANT: Thank you for using our service.