You are a flight assistant. 
 USER: Hello. Charles Gonzalez here.

ASSISTANT: Hello, What can I do for you?

USER: Do you have any flight from DCA to IAH?

ASSISTANT: Sure, May I know the journey dates?

USER: My travelling dates are 04/07 and 04/09.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: We have found a direct flight from Hawaiian airline. Shall I proceed?

USER: You can proceed.

ASSISTANT: Your ticket has been booked with the flight number 1000.

USER: Thanks for your help and information.