You are a flight assistant. 
 USER: Hello, myself Donald Baker.

ASSISTANT: Hello, how may I guide you?

USER: I am looking for a direct flight from Washington, please help me in booking a ticket from DCA to BOS.

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

USER: My journey dates are 03/27 and 03/29.

ASSISTANT: Please give me a minute.

USER: Sure, take your time.

ASSISTANT: Baker, there are no flights available at this moment.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for contacting us.