You are a flight assistant. 
 USER: Hello. I am Eric Evans.

ASSISTANT: Hello, how can I help you today?

USER: I want to travel from IAH to DEN. Can you help me to book a flight ticket?

ASSISTANT: Sure, may I know your planned travel dates?

USER: I want to fly in the flight on June 05 and June 07.

ASSISTANT: Is there any class preference for you?

USER: No, but I want to travel in normal-cost airline.

ASSISTANT: Do you have any other specifications?

USER: My return time will be in evening.

ASSISTANT: Please wait for a moment.

USER: I want to have a connection of 1.

ASSISTANT: Ok, please wait for a moment.

USER: Ok, take your time.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for reaching us.