You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Sarah Johnson.

ASSISTANT: How can I help you?

USER: I need a connecting flight in my journey, can you help me in booking?

ASSISTANT: Sure, may I know your airport codes please.

USER: I will fly from ORD to LAX.

ASSISTANT: May I know your travel dates please?

USER: My travelling dates are 05/28 to 05/30.

ASSISTANT: I am  sorry no flights found on your dates.

USER: No issue, thank you.

ASSISTANT: Thank you for choosing us.