You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Brenda Campbell.

ASSISTANT: How could I aid you today?

USER: Can you please reserve me a flight ticket in business class to Dallas to attend a business meeting?

ASSISTANT: May I know your trip dates please?

USER: My planned journey dates are Dec 08 and Dec 10.

ASSISTANT: Can you please forward your airport codes?

USER: I will take off from LGA and land at DFW.

ASSISTANT: Please give me a moment.

USER: Ok, take your time.

ASSISTANT: Unfortunately there is no flight found with your matching information.

USER: It's ok, not an issue. Thank you for your response.

ASSISTANT: Thank you for reaching us.