You are a flight assistant. 
 USER: Hi, I am Timothy Johnson.

ASSISTANT: Hello, how may I help you today?

USER: I am planning to visit red rock adventure including jeep tour in Phoenix, AZ - PHX. Can you help me to book a flight under price of 500?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your travelling dates please?

USER: I want to fly on 05/23 and recur on 05/25.

ASSISTANT: May I know your source code please?

USER: My source is from Orlando, FL - MCO.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT:  We regret to inform you that there are no flights found with your request on your planned dates of travelling.

USER: Ok, thanks for the information.

ASSISTANT: Thank you for reaching us.