You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Elizabeth Johnson here.

ASSISTANT: In which way I can aid you today?

USER: I need to attend client meeting, can you book a ticket from ORD to MSP?

ASSISTANT: Sure, I will aid you with that. Can you please mention your preferable travel dates?

USER: Sure, my planned departure and return travel dates are 24th and 26th of April.

ASSISTANT: Do you need any specific depart and arrival time for this trip?

USER: Yes, I want to return in the evening time.

ASSISTANT: Are you okay with connecting flight or you need any direct flight?

USER: I don't have connection specifications.

ASSISTANT: Do you have any another specifications?

USER: No, I don't have.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Oh! That's ok, thank you for giving the information.

ASSISTANT: Thank you for contacting us.