You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How can I help you out today?

USER: I am planning to visit discovery place to rare species at Charlotte.

ASSISTANT: Ok.

USER: I need to reserve a ticket with a connecting flight.

ASSISTANT: Sure. Could you please share your departure date?

USER: Sure, My departure date is on 08/11.

ASSISTANT: When are you planning to return?

USER: I intend to return on 08/13.

ASSISTANT: Ok, please tell your airport codes.

USER: My boarding point is CLT. on 08/13. I will start from ORD. Price range of my ticket should be 500.

ASSISTANT: Ok, may I know your name? to proceed further.

USER: You can reserve my ticket under Alexander Robinson name.

ASSISTANT: Sure, please wait a moment.

USER: Sure.

ASSISTANT: Thanks for you time, Unfortunately no flights on your travelling dates.

USER: Ok, no problem. Thank you for your service.

ASSISTANT: Thanks for reaching us.