You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I help you?

USER: I need to book a direct flight with the name of Helen Turner. Will you help me in this?

ASSISTANT: Sure, May I know the journey codes?

USER: I have to reach the Houston, IAH by leaving the Chicago, ORD.

ASSISTANT: Please help me with your travel dates.

USER: Travel dates are from 05/10 to 05/12.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with preferable dates.

USER: No problem. Thank you for your response.

ASSISTANT: Thank you for availing us.