You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Frank Lewis, want to travel from MSP to CLT. Please help me in booking my ticket.

ASSISTANT: Lewis, please provide your trip dates.

USER: Sure, my travelling dates are from 12/17 to 12/19.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Sorry, no flight is available on your planned dates of journey.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for contacting us.