You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Richard Adams.

ASSISTANT: How can I aid you?

USER: I am looking for a flight from LAS to ORD, can you help me out?

ASSISTANT: Sure, May I know your travelling dates?

USER: My trip dates are from Mar 1st till Mar 3rd.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a connecting flight.

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

USER: Ok, I want to take off my flight om afternoon and  return is also on afternoon.

ASSISTANT: Is there any other preferences?

USER: No,  I not have.

ASSISTANT: Thanks for your details, there are no flights found on your data.

USER: That's ok, not an issue. Thank you for your information.

ASSISTANT: Thank you.