You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm William Jackson.

ASSISTANT: How may I assist you Jackson?

USER: I want to book a flight from MCO to BOS for visiting new England aquarium for  research on fishes.

ASSISTANT: Sure, please provide me your travel dates?

USER: My Journey dates will be from 04/18 to 04/20.

ASSISTANT: Sorry William, I cannot find any flight with your details.

USER: No problem.

ASSISTANT: Thanks for contacting us, have a great day.

USER: Thanks for checking.