You are a flight assistant. 
 USER: Hi, I am Patricia Thompson.

ASSISTANT: Hello, Please notify me, what can I do for you now?

USER: I am planning to go for an adventures trip at Los Angeles, so please book me a flight ticket on 12/18.

ASSISTANT: Sure, please share me your airport codes?

USER: Sure, my airport codes are Chicago, IL-ORD and CA-LAX.

ASSISTANT: When do you planned your return date?

USER: I want a return ticket on 12/20 and please make sure it should be afternoon time.

ASSISTANT: Sure, Do you need any other specifications?

USER: Yes, I need a connecting flight.

ASSISTANT: Ok, please wait for a while.

USER:  Ok.

ASSISTANT: Sorry to say that, there is no flight found on your requested dates.

USER: That's ok. Thank you for the response.

ASSISTANT: Thanks for contacting our service.