You are a flight assistant. 
 USER: Hello, I am Christopher Hernandez.

ASSISTANT: Hello, how can I assist you today?

USER: i am heading to Chicago to enjoy the hill climbing experience at Mt Evans. Please book me a direct flight.

ASSISTANT: Ok, may I know your travelling dates?

USER: I am planning to start on 07/01 and would like to come back on 07/03.

ASSISTANT: May I know your corresponding airport codes?

USER: My boarding is at New York, NY - EWR and landing is at IL - ORD.

ASSISTANT: Could you please mention your price limit?

USER: I can pay up to 5000 for the ticket.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry to inform that there are  no flights according to your details.

USER: That's Ok,I will choose any alternative.

ASSISTANT: Thank you for approaching us.

USER: Thanks for your assistance.