You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. What kind of help are you expecting from my side?

USER: This is Catherine Wilson. I want to buy a flight ticket?

ASSISTANT: Sure, I am happy to help you. Please share your desired travel dates?

USER: I work in Wheeled Coach which is the world's largest manufacturer of ambulances and emergency service vehicles based in Orlando and I work there as a automobile engineer. I will travel there from DFW - MCO.

ASSISTANT: Can you provide me your airport codes?

USER: My journey will start on 08/14 and end on 08/16.

ASSISTANT: Wilson, please give me a moment, let me check with the availability of tickets.

USER: Ok.

ASSISTANT: I am sorry to say that there is no flight found. Thank you for contacting us.

USER: Ok, not a problem. May be I try with other options. Thanks for your help.

ASSISTANT: Welcome.