You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I have planned to go for Science festival at Washington, DCA. Can you please make a plane reservation on the name of Laura Lewis?

ASSISTANT: Let me know your travelling dates.

USER: Ok, my travelling dates are July 27 and July 29.

ASSISTANT: Can I know your boarding airport code?

USER: My boarding airport is Orlando, MCO.

ASSISTANT: Do you have any preference?

USER: Yes, my depart time is morning.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you.