You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Catherine Taylor here.

ASSISTANT: Taylor, how may I render you?

USER: I would like to meet my close friend at Dallas, please help me in booking a ticket from DEN to DFW.

ASSISTANT: Sure, please provide your itinerary dates.

USER: My planned journey dates are 07/24 and 07/26.

ASSISTANT: Please hold on for a while.

USER: Sure, take your time.

ASSISTANT: UA airlines with flight 1004 is providing service with a connecting flight.

USER: Ok, please book my ticket.

ASSISTANT: Your ticket is reserved.

USER: Thank you for your assistance.

ASSISTANT: Thank you for reaching us.