You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Raymond Smith here.

ASSISTANT: How can I assist you Raymond Smith?

USER: I need to visit Charlotte to participate in high level championship so can you please help me with flight ticket booking?

ASSISTANT: Sure, I'll help you with this. Can you please provide your nearest airport codes of travelling?

USER: Sure, I would like to travel from HOU to CLT.

ASSISTANT: May I know your preferable journey dates to check for the flights availability on this route?

USER: Sure, I need to depart on 07/14 and return will be on 07/16.

ASSISTANT: Hold on a moment please.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you, there are no flights available on this route with your provided dates.

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

ASSISTANT: Sorry for the inconvenience. Thank you for contacting us.

USER: Most welcome.