You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: Myself Nicholas Turner.

ASSISTANT: Sure, may I know on what dates you need booking?

USER: Can you please help me in booking a flight ticket from MSP to DCA locations? My travelling dates are from 05/13 and 05/15.

ASSISTANT: Sorry, there is no plane on your requested travelling dates.

USER: It's ok. Thank you for the information.

ASSISTANT: You are welcome.