You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Dennis Harris.

ASSISTANT: How can I assist you?

USER: I would like to visit Philadelphia to meet my family friend, please help me in booking a ticket from IAD to PHL.

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

USER: My journey dates are 07/26 and 07/28.

ASSISTANT: Please wait for a minute.

USER: Sure, take your time.

ASSISTANT: Spirit airlines is providing service on your journey dates with price 100. Shall I book the ticket for you?

USER: Ok, please proceed for booking.

ASSISTANT: Your ticket is confirmed and the flight number is 1021.

USER: Thank you for your assistance.

ASSISTANT: Thank you for contacting us.