You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am Sandra Lopez here. I am planning to visit Austin city to meet my grandfather from LGA to AUS. Can you make a reservation for me?

ASSISTANT: Sure Sandra Lopez, I am here to help you with the ticket booking. May I know your preferred travel dates?

USER: Ok, I want to airborne on 06/27 and recur on 06/29.

ASSISTANT: Ok, please hold on for a minute. So that, I will search the flight and let you know the details.

USER: Sure, take your own time.

ASSISTANT: Sorry to inform you that, I have not found any flight available in this route on the dates you have provided.

USER: Ok, that's fine, no problem. Thank you for your information.

ASSISTANT: You are welcome. Thank you for reaching us. Have a nice day.