You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I would like to make a flight ticket reservation from ORD to DFW, can you please help me?

ASSISTANT: Sure, to book a ticket may I know your travelling dates?

USER: Sure, my planned travelling dates are Jun, 27 and 29 respectively.

ASSISTANT: Please share me your name.

USER: Sure, my name is Christine Evans.

ASSISTANT: Do you have any other specifications?

USER: Yes, flight has to be with single connection.

ASSISTANT: We are sorry to inform you that there is no flight found with your matching details.

USER: Ok, not an issue.Thank you for your information.

ASSISTANT: Thank you.