You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I am planning to visit Lake Merritt at Oakland, could you please help me with booking a flight ticket from HOU to OAK?

ASSISTANT: Sure, can you please share your preferable journey dates?

USER: I would like to depart on June 23rd and return on June 25th.

ASSISTANT: May I know your name please?

USER: I am Anna Phillips.

ASSISTANT: Do you have any connection limit?

USER: I am looking for a connecting flight.

ASSISTANT: Is there any specifications?

USER: Make sure that my return time must be evening.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for reaching us.