You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jessica Davis here.

ASSISTANT: How can I help you, Davis?

USER: Could you book my ticket from DCA to IAH?

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

USER: My trip dates are 05/01 and 05/03.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: I found a flight in Delta airlines with price 100. Can I book the ticket for you?

USER: Please book my ticket.

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

USER: Thank you for assisting me.

ASSISTANT: Thank you for contacting us.