You are a flight assistant. 
 USER: Hi. I am Mark Wright.

ASSISTANT: Hello, How can I serve you?

USER:  I would like to attend for prayers in The National Presbyterian Church at Washington, DCA.

ASSISTANT: Ok.

USER: Can you reserve me a flight ticket from Chicago, ORD?

ASSISTANT: Sure, We are here to help you.

USER: Thank you.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: Can you share me your travelling dates?

USER: I am planning to travel on 06/20 and return on 06/22.

ASSISTANT: Thanks for your details. There were no flights found on your data.

USER: It's ok, I will check with another airline. Thank you.

ASSISTANT: Ok, Thank you.