You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me to book a flight ticket from ORD to IAD to meet my family members.

ASSISTANT: Sure, may I know your trip dates?

USER: I have planned to travel on May 26th and return on May 28th.

ASSISTANT: Ok, do you have any other requirements?

USER: Yes, I like one connecting flight.

ASSISTANT: Can I know your name please?

USER: Anna Harris.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: Ok, no problem in that. I will choose anther way to reach my destination.

ASSISTANT: Most welcome.

USER: Any way thank you so much for your kind help.