You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you?

USER: I am Emily Clark, can you help me to book flight ticket from IL - ORD to CA - LAX?

ASSISTANT: Sure, I will aid you. When are you planning to travel?

USER: Ok, please book a for the dates 11/04 and 11/06 respectively.

ASSISTANT: Kindly provide your price limit.

USER: Please book if the airfare limit is 500.

ASSISTANT: Please give me a minute.

USER: Ok, please take your own time.

ASSISTANT: Unfortunately, there is no flight available matching with your requirements. Thanks for availing us.

USER: Ok, that is not a problem. I will make my trip by other means.

ASSISTANT: Ok, thank you.