You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you?

USER: Please make a reservation with the name of Catherine Martinez to Los Angeles.

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are 01/15 and 01/17.

ASSISTANT: Do you need any stopover in between the journey?

USER: I need a direct flight.

ASSISTANT: Kindly provide your journey codes.

USER: My journey airport codes are PHX and LAX.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: There is no flight available which matches with your requirements.

USER: No problem, thank you for the information.

ASSISTANT: Thanks for choosing us.