You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Joseph Scott here.

ASSISTANT: How can I aid you now? Good afternoon Scott.

USER: I would like to meet my friend in Denver to discuss about my business so, can you please help me with flight ticket booking?

ASSISTANT: Sure, I can do your advance booking, can I know your convenient dates Scott?

USER: Sure, I have planned my travel dates as 08/15 and 08/17.

ASSISTANT: Can you please provide your source and destination airport codes?

USER: Sure, I need to depart from AUS and landing in DEN.

ASSISTANT: Please wait to check the flights availability in this busy schedule.

USER: Sure, take your time to check.

ASSISTANT: Thank you for your patience, I found a flight 1024 in UA airlines with a connection limit of 1. Can I proceed your plane ticket booking?

USER: But I need direct flight, please check with connection 0.

ASSISTANT: No airlines is available at your request in direct flights, I am sorry Scott.

USER: Oh! It is sad to hear.

ASSISTANT: Sorry for the inconvenience Scott.

USER: Anyway, thank you for your time.

ASSISTANT: You are welcome.