You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Myself Frank Hall from Washington. Could you please help me in flight ticket booking process from IAD to DFW?

ASSISTANT: Sure, I am here to help you. Please share your planned travel dates?

USER: Thank you for your response, I want to take off on June 13 and book my return ticket also on June 15.

ASSISTANT: Do you want a connecting flight?

USER: Yes.

ASSISTANT: Please let me know if you have any other preferences.

USER: No.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: We have a flight from Spirit airlines, number 1015 and it is costing you 100. Shall I proceed?

USER: That's fine, please book this flight ticket for me.

ASSISTANT: Your ticket is booked in economy class.

USER: Thank you for your service.

ASSISTANT: Thank you for opting us.