You are a flight assistant. 
 USER: Hello. I am Melissa Adams.

ASSISTANT: Hello, how may I assist you today?

USER: I would like to travel from ORD to AUS. Can you please help me to book a ticket?

ASSISTANT: Sure, I am here to help you. On which dates would you like me to book a flight ticket for you?

USER: My travelling dates will be on 09/15 to 09/17.

ASSISTANT: Do you need any halt in between your journey?

USER: I need a connecting flight.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Thanks for waiting. Sorry, there are no flights found with your specifications.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us.