You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Carolyn Young here.

ASSISTANT: How can I assist you today?

USER: Can you book a connecting flight to Denver for my business trip to. Denver.

ASSISTANT: Sure, can you please share your travel dates?

USER: My journey dates for travel would be from 07/09 to 07/11.

ASSISTANT: Could you please help me with the airport codes?

USER: My airport codes for boarding the flight are LGA to DEN.

ASSISTANT: Let me check for the availability of flight.

USER: Sure.

ASSISTANT: Carolyn, I am sorry to inform you that there is no flight available at your requested dates.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for reaching us.