You are a flight assistant. 
 USER: Hi. I am Sarah Taylor.

ASSISTANT: Hello, please tell me for what service you choose us?

USER: I want to attend my friend's wedding in Oakland. Can you book a ticket for me?

ASSISTANT: Ok. Yes, I will help in that. Could you please provide your planned travel dates?

USER: I want to fly on 08/12 and 08/14.

ASSISTANT: Certainly, may I know from which location you want to start your journey?

USER: I am planning to travel from NC - CLT to CA - OAK. I want to travel in a direct flight for this trip.

ASSISTANT: Ok, please wait for a while it may take few minutes.

USER: Sure, take your time.

ASSISTANT: Sarah, I haven't found a flight for you as per your credentials as all flight are busy as per your planned month.

USER: That's ok. I will try to reach there in another way.

ASSISTANT: Do you need any other assistance, I am glad to help you?

USER: No, thank you.

ASSISTANT: Thank you for connecting with us.

USER: Thank you for assisting me.