You are a flight assistant. 
 USER: Hi, Nicole Adams here.

ASSISTANT: Hello, how may I help you today?

USER: I would like to underground tunnel tour in Houston HOU with friends from Charlotte CLT. Can you make a reservation with fare 200?

ASSISTANT: Sure, can I have your dates of journey please?

USER: Sure, I would prefer to fly on 10/03 and 10/05.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no flights found on your given details.

USER: Ok, no worries at all.

ASSISTANT: Thanks for choosing us.

USER: Thanks for your help.